Cooler box



FIG. 1 is a front elevational view of a cooler box as shown and described;

FIG. 2 is a left side elevational view, the right side being identical thereto;

FIG. 3 is a front, right, top perspective view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines and the areas within them depict portions of the cooler box that form no part of the claimed design. 

CLAIM The ornamental design for a cooler box, as shown and described. 